Effect of Number of Probes and Their Orientation on the Calculation of Several Compressor Face Distortion Descriptors
Stoll, Frederick and Tremback, Jeffrey W. and Arnaiz, Henry H. (1979) Effect of Number of Probes and Their Orientation on the Calculation of Several Compressor Face Distortion Descriptors. Technical Report NASA TM-72859, Research Engineering, NASA Dryden Flight Research Center.
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Abstract
A study was performed to determine the effects of the number and position of total pressure probes on the calculation of five compressor face distortion descriptors. This study used three sets of 320 steady state total pressure measurements that were obtained with a special rotating rake apparatus in wind tunnel tests of a mixed-compression inlet. The inlet was a one-third-scale model of the inlet on a YF-12 airplane, and it was tested in the wind tunnel at representative flight conditions at Mach numbers above 2.0. The study showed that large errors resulted in the calculation of the distortion descriptors even with a number probes that has been considered adequate in the past. There were errors as large as 30 and -50 percent in several distortion descriptors for a configuration consisting of eight rakes with five equal-area-weighted probes on each rake.
| EPrint Type: | NASA Technical Memorandum |
|---|---|
| Keywords: | Compressor face distortion, Compressor face pressure measurements |
| Subjects: | (01 - 09) Aeronautics: (07) Aircraft Propulsion And Power Aircraft/Project: YF-12 |
| ID Code: | 665 |
| Deposited On: | 10 Febuary 2006 |
| Additional Information: | 42 pages. |
